MATERIALS

EPP grade selection

Compare expanded polypropylene grades around density, processing, component geometry and operating conditions.

A PRACTICAL STARTING POINT

Choose around the application.

Select the grade around your component requirements. Discuss moulded density, repeated loads, temperature exposure and representative samples with PARK before agreeing the specification.

Questions to bring to the conversation

What is the application, and which requirements are essential?
How will the finished component be manufactured and assembled?
Which conditions should be represented in testing?
What happens at the end of the useful service life?

Any performance, food-contact or environmental claim needs evidence for the specific grade and application. Agree the validation and documentation requirements before selecting a final design.

Start with the component

Bring the part geometry, target weight and working loads into the grade review. Define the required moulded density and appearance, then consider any electrical, thermal or product-contact requirements.

Compare suitable grade options

Assess candidate grades using current technical data and representative moulded samples. For recycled-content options, confirm the declared content, feedstock route and any effect on processing or the finished part.

Set the acceptance criteria

Agree dimensional tolerances, conditioning and functional tests before approval. Material data describe specific test conditions; validate the finished component in its intended assembly and operating environment.

Material and design considerations

Density specification	Specify finished moulded density and tolerance separately from loose-bead bulk density.
Performance data	Compare mechanical and thermal data for the proposed grade, density and test conditions.
Special requirements	State fire, electrical, food-contact or chemical-exposure requirements where relevant, and request evidence for the selected grade and application.
Sample approval	Use representative parts to confirm fit, handling and the performance criteria agreed for the project.

Discuss your application with PARK ↗

FROM YOUR APPLICATION TO A CLEARER SPECIFICATION

Tell us what you need.
Let’s explore the possibilities.

Share your drawing, dimensions or current packaging.
Start a practical conversation about the right format.

Discuss your requirement sales@parknonwoven.com ↗